gtpphase Help File
This tool operates on input event file(s) to compute a pulse phase for a photon arrival time of each event, and writes it to the PULSE_PHASE column (by default) of the event file(s). Ephemeris information can be given in one of the following forms:
If necessary, this tool reads the spacecraft orbit file and performs the barycentric correction and the binary demodulation to each photon arrival time on-the-fly.
The simplest way to run the gtpphase tool, which may suffice for most applications, is for the tool to extract the information from a master pulsar database. The exact process the tool uses for choosing ephemerides is described below.
Another option is to supply the essential ephemeris information manually. For example, this may be useful when an ephemeris is not available in a database, but the necessary information is available in the literature. In the example shown below, the same values which were extracted from the database in the previous example were entered manually.